Maintenance structure for low-speed end of gearbox

Abstract

The utility model relates to the technical field of wind power gear boxes, in particular to a maintenance structure of a low-speed end of a gear box, which comprises a machine base, a bearing seat fixed on the machine base, a main shaft rotationally connected to the bearing seat and a limiting mechanism positioned at the end part of the main shaft, the limiting mechanism comprises a pressing plate fixed to the machine base, the upper surface of the pressing plate is in an arch shape, the lower surface of the pressing plate is a horizontal plane, a concave inner arc face is arranged in the middle of the lower surface of the pressing plate, the two ends of the pressing plate are fixedly connected to the machine base through screws, and after the pressing plate is fixed, the inner arc face of the lower surface of the pressing plate is tightly attached to the outer circle face of the main shaft. According to the structure, the gear box can be maintained without disassembling the hub and the main shaft, the maintenance period is greatly shortened, the cost is reduced, and convenience is improved; and meanwhile, the pressing force uniformity of the pressing plate on the main shaft can be improved, the pressing plate is not prone to deformation, the assembly connection precision of the main shaft and the low-speed end of the gearbox is guaranteed, abnormal transmission and bearing damage are avoided, and stable and reliable operation of the gearbox is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wind power gear box, concretely is a kind of maintenance structure of gear box low speed end. BACKGROUND

[0002] Wind power gear box is one of the key components of wind power generation equipment, wind wheel rotates under the action of wind, and the mechanical energy generated is transmitted to the low speed end of gear box through main shaft, and the multi-stage gear transmission mechanism inside gear box converts the power of low speed and large torque into the power of high speed and small torque according to transmission ratio, and then transmits to generator, so that generator rotates at high speed to generate electric energy.

[0003] When the low speed end of wind power gear box needs to be maintained and repaired, since the low speed end of gear box is connected with main shaft, and the installation and fixation of bed are related to gear box, it is usually necessary to disassemble blades, hub and nacelle, use large lifting equipment to lift main shaft and bed together from tower drum, then loosen locking disc used for connecting main shaft and gear box, so that gear box can be withdrawn from main shaft, to facilitate the repair and replacement of fault parts of low speed end of gear box.

[0004] The middle part of bridge type pressing plate in prior art is large radius arc, when pressing upper pressing plate, only the middle concave part of bridge type pressing plate contacts with upper pressing plate, the uniformity of pressing force is difficult to guarantee, and since the thickness of bridge type pressing plate is thin and the strength is insufficient, and the blades and hub of wind power gear box are heavy, the bridge type pressing plate is prone to deformation under long-term use, which reduces the pressing effect, and easily causes the position of main shaft to change, thereby affecting the assembly of gear box and main shaft, causing transmission abnormality and damage of bearing and other components. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of maintenance structure of gear box low speed end, can solve the problem that the pressing force uniformity of bridge type pressing plate in the gear box structure in prior art to main shaft is low, and the strength is poor and easy to deform, which leads to poor pressing effect, easily causes the position of main shaft to change, thereby affecting the assembly of gear box and main shaft, and further causing transmission abnormality and damage of bearing component.

[0006] The application provides the following technical scheme: a maintenance structure of a low-speed end of a gear box, comprising a base, a bearing seat fixed on the base, a main shaft rotatably connected to the bearing seat, and a limiting mechanism located at an end of the main shaft; the limiting mechanism comprises a pressing plate fixed on the base, an upper surface of the pressing plate is arched, a lower surface of the pressing plate is horizontal, a concave inner arc surface is arranged in the middle of the lower surface of the pressing plate, and both ends of the pressing plate are fixed on the base through screws, and after the pressing plate is fixed, the inner arc surface of the lower surface of the pressing plate is tightly combined with an outer surface of the main shaft.

[0007] Beneficial effects:

[0008] The inner arc surface of the lower surface of the pressing plate in the limiting mechanism is tightly combined with the outer surface of the main shaft, when the main shaft is subjected to axial force or radial force, the pressing plate can effectively limit the axial movement and radial jump of the main shaft. Therefore, after the gear box is disassembled, the main shaft can still maintain balance under the pressing action of the pressing plate, without the need to disassemble the hub and the main shaft, the gear box can be maintained and repaired, the maintenance cycle is greatly shortened, the cost is reduced, and the convenience is improved; the inner arc surface is tightly combined with the outer surface of the main shaft, compared with the prior art, the pressing force can be uniformly applied to the surface of the main shaft, the position of the main shaft is prevented from changing, the pressing effect is improved, and the upper surface of the pressing plate is arched and the lower surface is horizontal, so that the overall strength of the pressing plate is higher and deformation is less likely to occur, the stability of the main shaft after being pressed is further improved by fixing the pressing plate on the base through the screws at both ends of the pressing plate, the assembly and connection precision of the main shaft and the low-speed end of the gear box is effectively ensured, abnormal transmission and bearing damage are avoided, and stable and reliable operation of the gear box is ensured.

[0009] Further, the screws are arranged in a matrix.

[0010] Beneficial effects: Since various forces and vibrations in various directions are generated on the main shaft during the operation of the gear box, the matrix arrangement enables the screws to be uniformly distributed on the connecting surface of the pressing plate, and when the screws are tightened, the pressing force of the pressing plate can be uniformly transmitted to each part, so that the local pressure is prevented from being too large or too small, and the uniform pressure distribution can ensure that the pressing plate is always stably attached to the main shaft, effectively limits the displacement of the main shaft, and ensures the stable operation of the gear box.

[0011] Further, a supporting block is further fixed on the base, and both ends of the pressing plate are located above the supporting block, and the screws lock both ends of the pressing plate on the supporting block.

[0012] Beneficial effects: The supporting block is fixed on the base to provide a solid and stable supporting platform for the pressing plate, the supporting block firmly connects the pressing plate and the base, so that the pressing plate does not shake or displace during work, thereby ensuring effective limiting of the main shaft, and at the same time, the height of the supporting block can be adjusted to ensure that the inner arc surface of the lower surface of the pressing plate and the outer surface of the main shaft are in the optimal attachment position, thereby improving the pressing effect.

[0013] Further, the base is also fixed with a gear box, and the gear box is connected with the main shaft through a locking disc.

[0014] Beneficial effects: when installing the locking disc, only need to put the locking disc on the main shaft, and then make the locking disc generate radial shrinkage force by tightening the bolts, so as to tightly connect the gear box and the main shaft together. This installation method does not need to make complex processing and adjustment to the main shaft and the gear box, greatly shortens the installation time, and improves the installation efficiency. When maintaining, repairing or replacing the gear box or the main shaft, only need to loosen the bolts of the locking disc, so that the gear box and the main shaft can be easily separated, so that the maintenance and replacement work of the equipment is more convenient, reduces the maintenance cost and downtime, and improves the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural front view of the utility model.

[0016] Figure 2 It is Figure 1 It is an isometric view after removing the gear box and the locking disc. DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The marks in the drawings of the specification include: the main shaft 1, the base 2, the gear box 3, the pressing plate 4, the supporting block 5, the screw 6, the bearing 7, and the locking disc 8.

[0019] Embodiment one

[0020] As shown in Figure 1 and Figure 2 A maintenance structure of a low-speed end of a gear box, which comprises a base 2, a bearing 7 seat fixed on the base 2, a main shaft 1 rotationally connected on the bearing 7 seat and a limiting mechanism located at the end of the main shaft 1.

[0021] The limiting mechanism comprises a supporting block 5 fixed on the base 2 and a pressing plate 4 fixed on the supporting block 5. The supporting block 5 provides a solid and stable supporting platform for the pressing plate 4, and the supporting block 5 firmly connects the pressing plate 4 with the base 2, so that the pressing plate 4 will not shake or displace during work, thereby ensuring effective limiting of the main shaft 1. Meanwhile, by adjusting the height of the supporting block 5, the optimal fitting position of the inner arc surface of the lower surface of the pressing plate 4 and the outer surface of the main shaft 1 can be ensured, thereby improving the pressing effect. The upper surface of the pressing plate 4 is arched, the lower surface of the pressing plate 4 is horizontal, the middle of the lower surface of the pressing plate 4 is provided with a recessed inner arc surface, the two ends of the pressing plate 4 are fixedly connected on the supporting block 5 through the screw 6, the main shaft 1 is arranged in the axial direction, and the inner arc surface of the lower surface of the pressing plate 4 is tightly fitted with the outer surface of the main shaft 1, so as to effectively limit the axial movement and radial jumping of the main shaft 1.

[0022] As shown in Figure 2 The screws 6 at both ends of the pressing plate 4 are arranged in a matrix. Since the main shaft 1 will generate forces and vibrations in various directions during the operation of the gear box 3, the matrix arrangement enables the screws 6 to be evenly distributed on the connecting surface of the pressing plate 4, and when the screws 6 are tightened, the pressure of the pressing plate 4 can be evenly transmitted to each part, avoiding excessive or insufficient local pressure. The uniform pressure distribution can ensure that the pressing plate 4 is always stably attached to the main shaft 1, effectively limiting the displacement of the main shaft 1 and ensuring the stable operation of the gear box 3.

[0023] As shown in Figure 1 The gear box 3 is also fixed on the machine base 2, located near the end where the pressing plate 4 is located. The gear box 3 is connected to the main shaft 1 through the locking disc 8. When installing, the locking disc 8 is simply sleeved on the main shaft 1, and then the locking disc 8 is radially contracted by tightening the bolts, thereby tightly connecting the gear box 3 and the main shaft 1 together. This installation method does not require complex processing and adjustment of the main shaft 1 and the gear box 3, greatly shortening the installation time and improving the installation efficiency. When maintaining, repairing or replacing the gear box 3 or the main shaft 1, only the bolts of the locking disc 8 need to be loosened, and the gear box 3 and the main shaft 1 can be easily separated, making the maintenance and replacement of the equipment more convenient, reducing maintenance cost and downtime, and improving efficiency.

[0024] The use method of the scheme is as follows:

[0025] When the gear box 3 needs to be disassembled and maintained, only the locking disc 8 needs to be loosened, and the gear box 3 and the main shaft 1 can be separated, and the gear box 3 can be taken out for maintenance. Due to the effect of the pressing plate 4, after the gear box 3 and the main shaft 1 are separated, the main shaft 1 can still maintain balance under the pressing action of the pressing plate 4, and the gear box 3 can be maintained and repaired without disassembling the hub and the main shaft 1, greatly shortening the maintenance period and reducing the cost. After the gear box 3 is improved, it can be easily reassembled in reverse order, effectively improving the convenience. The inner circular arc surface closely fits the outer circular surface of the main shaft 1. Compared with the prior art, the scheme can ensure that the pressing force is evenly applied to the surface of the main shaft 1, prevent the position of the main shaft 1 from changing, improve the pressing effect, and the upper surface of the pressing plate 4 is arched and the lower surface is horizontal, making the overall strength of the pressing plate 4 higher and less prone to deformation. By fixing the pressing plate 4 on the machine base 2 through the screws 6 at both ends of the pressing plate 4, the stability of the main shaft 1 after being pressed is further improved, effectively ensuring the assembly and connection precision of the main shaft 1 and the low-speed end of the gear box 3, avoiding abnormal transmission and bearing 7 damage, and ensuring the stable and reliable operation of the gear box 3.

[0026] The above is only an embodiment of the present application, and the present application is not limited to the field of the embodiment, and the common knowledge such as specific structures and properties in the scheme is not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of the claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A maintenance structure for the low-speed end of a gearbox, characterized in that: The device includes a base, a bearing housing fixed on the base, a spindle rotatably connected to the bearing housing, and a limiting mechanism located at the end of the spindle. The limiting mechanism includes a pressure plate fixed on the base. The upper surface of the pressure plate is arched, and the lower surface of the pressure plate is horizontal. A recessed inner arc surface is provided in the middle of the lower surface of the pressure plate. Both ends of the pressure plate are fixedly connected to the base by screws. After the pressure plate is fixed, the inner arc surface of the lower surface of the pressure plate is in close contact with the outer arc surface of the spindle.

2. The maintenance structure for the low-speed end of a gearbox according to claim 1, characterized in that: The screws are provided in multiples and arranged in a matrix.

3. The maintenance structure for the low-speed end of a gearbox according to claim 2, characterized in that: The base is also fixed with a support block, and the two ends of the pressure plate are located above the support block. Screws lock the two ends of the pressure plate onto the support block.

4. The maintenance structure for the low-speed end of a gearbox according to claim 3, characterized in that: A gearbox is also fixed on the base, and the gearbox is connected to the main shaft through a locking disc.

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